Yes, a faulty automatic transmission (AT) can cause the Check Engine light to illuminate on your vehicle’s dashboard.
Here are some possible reasons for the Check Engine light to come on due to a faulty automatic transmission:
* Sensor Problems: Faulty transmission sensors (such as the speed sensor or shift position sensor) can send incorrect signals to the engine control unit (ECU), causing the Check Engine light to illuminate.
* Electrical faults: Opens or short circuits in the automatic transmission wiring can affect its operation and cause the Check Engine light to illuminate.
* Slipping or Excessive Wear: Wear on internal automatic transmission components, such as clutches and gears, can lead to slipping and excessive wear, which is reflected in trouble codes that cause the Check Engine Light to illuminate.
*Low Transmission Fluid Level: Low transmission fluid levels can cause overheating and damage to the internal components of the automatic transmission, which can also cause the Check Engine Light to come on.
*Hydraulic System Problems: Problems with the automatic transmission’s hydraulic system, such as leaks or blockages, can affect fluid pressure and proper operation of the transmission, resulting in problems shifting gears and an illuminated Check Engine Light.
Diagnosing and repairing automatic transmission problems that cause the Check Engine light to illuminate usually requires special equipment and knowledge. It is recommended that you contact a qualified mechanic for diagnosis and repair.